My online group's GM has been having difficulties with scheduling, so I suggested some alternate games they I would be willing to run. Mecha Against the Giants turned out to be popular, so I started noodling on mecha and giant design:
http://noschoolgrognard.blogspot.com...on-giants.html
More information got written up (
http://ottgaming.grimoire.ca/MAGT/Main), including a lot more detail on the mecha themselves.